Pipe coating apparatus



' A. G. PERKINS PIPE COATING APPARATUS Filed May 22, 1936 n n W W apparatus consists generally of a carriage which tator or bladed wheel 23 for keeping the concrete Patented Dec-21, 1937 v v UNITED STATES PATENT OFFICE 2,102,738 PIPE COATING APPARATUS Albert G. Perkins, Warsaw, N. Y.

Application May 22, 1936, Serial No. 81,275

7 Claims. (01. 91-44 This invention relates to an apparatus which steering wheel or caster I3 mounted on a swiveling has been designed more particularly for applying fork l4. Motion is transmitted to the traction a protective coating or lining to the inner walls of wheels from an electric or like motor 15 suitably pipes, conduits and the like. mounted on the carriage-body, the drive from the 1 It has for one of its objects to provide an effimotor being through the medium of a gear train 5 cient apparatus of this. character having simple, of usual construction. For the purpose of this reliable and inexpensive means for effecting an description, the wheels I2 may be considered as uninterrupted and continuous uniform feed of the mounted at the rear end of the machine and the coating material to the distributing head of the steering wheel l3 at the front end thereof. machine. Disposed at the front end ofv the machine is a Another object of the invention is the provision feed hopper or container l6for the coating mateof a pipe coating machine having improved means rial and extending rearwardly therefrom is a feed for centrifugally distributing the material against conduit or passage H which is disposed lengththe pipe wall. wise and centrally of the machine and approxi- In the accompanying drawing:- mately axially of the pipe III. A screw conveyor [8 Figure l is a side elevation of my improved or like device is provided in the hopper and feed coating apparatus, the same being shown within conduit for positively feeding the material from a pipe line for treating the interior wall thereof the hopper through the conduit to the discharge with a protective coating. Figure 2 is an enend of thesame. This screw conveyor may be larged fragmentary longitudinal section of the driven at slow speed in any appropriate manner. discharge end of the machine showing the dis- At its discharge end, the feed conduit I1 is protributor head and blade structure. Figure 3 is a vided with an annular row of parallel discharge cross section taken substantially in the plane of ports l9 and applied to the ported end of this conline 33, Figure 2. Figure 4 is an enlarged fragduit is a distributor head rotatably mounted on 2: mentary side elevation of the ported discharge end the conduit and including a hub 20, a disk 2| and of the feed tube or conduit. Figure 5 is a fraga plurality of substantially radial blades or vanes mentary perspective view-0f a slightly modified 22 secured to the face of the disk and disposed construction of distributing blade. I with their inner edges adjacent the periphery of Similar characters of reference indicate'correthe conduit for intercepting and directing the spending parts through the several views. coating material, discharged from the ports I! do While my apparatus may be employed for coatonto the pipe wall. The disk 2| may be rotated in ing different kinds of work, it has been primarily any appropriate manner, as by'a driving connecdesigned for treating the inner walls of steel pipe tion with the motor I5, shown by dotted lines in lines with a protective coating, such for example, Figure 1. If desired, the rear end of the screw as a plastic material as concrete. To this end the conveyor l8 may be provided with a suitable agiis adapted to be propelled through the pipe line in motion and at its proper consistency. It is and which carries the working parts of the appreferred that the inner edges of the blades terparatus, such working parts comprising essenminate short of the conduit surface to form an tially a hopper or container for the coating mateannular relief space or receiving chamber for the 40 rial having a conduit or feed pipe connected therematerial. with, means for conveying the material from the The discharge ports I9 are preferably disposed hopper through thev conduit, a dispensing or disat an angle or obliquely to the horizontal in subcharge head into which the material is delivered stantially the manner shown in Figure 4, whereby and from which it is discharged by centrifugal there is an overlapping of the ports to provide in forceonto the pipe wall, and means for troweleffect a continuous and uniform feed or dising the material after it has been applied to the charge of the material from the conduit as well r pipe wall. 1 as a shearing and breaking up action of the mor- Referring now to the drawing, it indicates a tar during its discharge. The distributing blades section of the steel pipe line through which my 22 intersect portions or segments of a plurality of apparatus travels during the coating of the inthe ports l9, as seen by dotted lines in Figure 4, ner wall with concrete or like plastic or semi-solid each blade section, for example, spanning the material. The carriage may consist of a body I I middle of one port and the opposing ends of adprovided at one end with traction or supporting joining ports, thereby effecting by this oblique wheels I2 and provided at its, opposite end with a ported arrangement the desirable continuous feed of the material in a substantially flat sheet to the revolving blades.

The tips or discharge ends of the distributing of the coating material onto the pipe wall. As shown in Figure 3, the tip ends of the blades may be bent, as shown at 25, preferably in the same direction as that of the rotation of the distributing head. This construction has the eiiect of increasing the velocity of the coating material as it is discharged centrifugally from the blades, and this increased velocity aflords a denseand compact application of the material onto the pipe wall.

At the rear end of the machine I have shown a suitable troweling device indicated generally by the numeral 26 which serves to smooth out the coating material after it has been applied to the pipe wall. I have also shown a distributing nozzle 21 for the purpose of treating the coating material with a curing fluid after it has been applied to the pipe wall and troweled.

I claim as my invention: 1. An apparatus for lining pipe walls and the like, comprising a Ieed.conduit adapted for communication with a source of coating material and having an annular row of discharge ports therein, said ports being disposed obliquely to the conduit axis, and a revolving dispensing member including intercepting blades disposed in operative communicating relation to and covering a plurality of said discharge ports simultaneously for receiving and discharging the material centriiugally therefrom onto the pipe wall.

2. An apparatus for lining pipe walls and the like, comprising a feed conduit adapted for communication with a source of coating material and having an annular row of discharge ports therein, said ports being disposed obliquely to the conduit axis in substantially parallel relation and with their ends overlapping portions of adjoining ports to' provide a continuous discharge of material therethrough, and a revolving dispensing member disposed in operative communicating relation to said ports forreceiving and discharging the material centrifugally therefrom onto the pipe wall.

3. An apparatus for lining pipe walls and the like, comprising a feed conduit adapted for communication with a source of coating material and having an annular row of discharge ports there- 'in, said ports being disposed obliquely to the conduit axis, and a revolving dispensing member disposed in operative communicating relation to said discharge ports and including substantially radial blades having their inner edges disposed adjacent the periphery of the feed conduit and in intersecting relation to a plurality of its ports simultaneously, the free edges of said blades being serrated.

4. An apparatus for lining pipe walls and the like, comprising a feed conduit adapted for com like, comprising a feed conduit adapted for communication with a source of coating material and having an annular row of discharge ports therein, said ports being disposed obliquely to the conduit axis, and a revolving dispensing member disposed in operative communicating relation to said discharge ports and including substantially radial blades having their inner edges disposed adjacent the periphery of the feed conduit and in intersecting relation to a plurality of its ports simultaneously; the outer ends of said blades being laterally bent in a direction corresponding to the direction of rotation of the dispensing member, and having their free edges serrated crosswise of the blades.

6. An apparatus for lining pipe walls and the like, comprising a feed conduit adapted for communication with a source of coating material and having an annular row of discharge ports therein, and a revolving" dispensing member disposed in operative communicating relation to said discharge ports for receiving and discharging-the material centrifugally therefrom onto the pipe wall, said dispensing member including substantially radial blades disposed substantially transversely to the plane of its rotation and having their inner edges disposed adjacent the periphery of the feed conduit to intercept the material discharged through said ports and having their outer free edges serrated crosswise of the blades.

7. An apparatus for lining pipe walls and the like, comprising a feed conduit adapted for communication with a source of coating material and having discharge ports therein, and a revolving dispensing member in operative relation to said ports and including substantially radial blades disposed substantially transversely to the plane of its rotation and having their inner edges disposed adjacent the conduit ports and having means extending transversely across their outer edges for breaking up the material as it is discharged from the blades.

ALBERT G, PERKINS. 

